Window operator



Dec. 16, 1947. A. RAPPL WINDOW OPERATOR Filed Aug. 15, 1942 4Sheets-Shet 1 m, 0 n V0 mp F m V. mwmm ATTORNEYS WINDOW OPERATOR FiledAug. 13, 1942 4 Sheets-Sheet 2 rfloa fi g pl,

. ATTORNEYS Dec. 16, 1947. A, RAPPL 2,432,799

WINDOW OPERATOR Filed Aug. 13, 1942 4 Sheets-Sheet 3 IQNVENTOR pkonRappL @MMMCBM.

ATTORNEYS Dec. 16, 1947. A. RAPPL 2,432,799

WINDOW OPERATQR Filed Aug. 15, 1942 4 Sheets-Sheet '4 Fig.9.

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J 84,85 V1, 90 17 92 3%; z, H 1 5 105 5;; $06 X i INVENTOR Amen RappLQWMMQM ATTORNEYS Patented Dec. 16, 1947 UNITED .STATES PATENT OFFICEWINDOW OPERATOR Anton Rappl, Buffalo, N. Y., assignor to Trico ProductsCorporation, Buil'alo, N. Y.

Application August 13, 1942, Serial No. 454,634

24 Claims. 1

This invention relates to a window operating mechanism and primarily toa mechanism 'for the operation of the vertically slidable windows ofmotor vehicles wherein the window is mounted in vertical guideways foropening and closing movement into and out of a well provided to receiveit in the vehicle door or body.

' It has heretofore been proposed to manipulate the vertically slidablewindow through suitable linkage with or without the aid of suitablecounterbalance means and because of the fact that the window panel isfrequently of odd shape, such as with the top beveled which shortens onevertical edge relative to the other, extreme care must be given to avoidthe canting of the panel and causing an objectionable binding of thesame in its guides.

The object of the present invention is to provide a practical and simplesupport for the window panel which will be eflicient in operation whileffectively holding the panel against binding in its guideway but ratherprovide for a smooth and even movement during window adjustment.

The invention further aims to provide a power operated window regulatorwhich is compact in design for facilitating its installation in theconfined space available in the modern motor vehicle.

In the drawing Fig. 1 is a diagrammatic view depicting the presentinvention in one embodiment associated with the window of a motorvehicle;

Figs. 2 and 3 are detailed views showing the manner of connecting thewindow panel to its adjustable support and operating mechanism;

Fig. 4 is an enlarged longitudinal sectional view through the power unitof the mechanism, parts being broken away;

Fig. 5 is an end elevation of the motor;

Fig. 6 is a modified showing of the present invention;

Fig. 7 is an elevation, partly in section, of a modified motorconstruction;

Fig. 8 is an exploded perspective of the piston rod connecting means;

Fig. 9 is a diagrammatic view, similar to Fig. l, depicting a furtherembodiment;

Figs. 10 and 11 are detailed views of the selfadjusting connectorbetween the window and the active portion of the flexible operator shownin of endless flexible members or hands 9 and 9' engages. The connectinglug 6 is fixed on its flexible member and may be in the form of a headedscrew In, having its shank ll formed with a chordal slot l2 to receivethe flexible member, and a nut l3 which is threaded on the shank ii toclamp upon the head. The head of the screw and the nut preferably havesupporting engagement with th wall parts of the bearing 5 in a manner topermit the connecting lug riding therein in accommodation of difierenceswhich may occur between the movements of the flexible member and thewindow. By means of the clamp nut I3 the lug is adjustably secured in afixed position on its flexible member which latter is preferably in theform of a thin flat tape or ribbon of steel or other suitable material.The flexible members are supported on guide pulleys l4, l5, l6 and I! toprovide the active flights or portions i8 and IS on which the connectinglugs 6 are fixed. The shorter member 9' is supported solely by thepulleys I5 and I! while the longer member 9, after taking about pulleysI 4 and It may also pass about the pulleys l5 and I! on top of theshorter member for movement in unison therewith.

Between the lower pulleys l5 and I1 is arranged the drive for moving theflexible support for the window, the drive herein depicted being of thepower type and comprising a fluid motor having a cylindrical or tubularcasing 20 with a chamber in which operates a piston 2|. The oppositeends of the casing chamber ar connected by conduits 22 and 23 to a fluidpressure supply'line 24 which in turn is connected to a source of power,such as the intake manifold of the motor vehicle in-,

ternal combustion engine. While superatmospheric pressure may be used,suction is preferred, and in the illustrated embodiment the source ofsuction is in constant communication with the chamber 20 at both sidesof the piston 2| to thereby balance the pressure on opposite sidesthereof. When it is desired to operate the motor either valve 25 orvalve 26 will be operated to interrupt the suction communication andvent the respective side of the chamber to the atmosphere, therebycreating an unbalanced condition and providing a pressure differentialfor moving the piston toward the low pressure side. For example, ifvalve 25 is actuated to open the left hand end of chamber 20, as viewedin Fig. 1, to the atmosphere the relatively higher pressure of theoutside atmosnhere will enter the chamber and act upon the piston 2| tomove it to the right. This causes the flexibl portions or fl ghts l8 andill to move the connecting lugs downwardly and lower the window.Actuation of the valve 26 will cause an upward movement of the window toa closed position. In the illustrated embodiment the longer flexiblemember incorporates the piston structure as a part thereof to make anendless f rm by being connected d rectly to the opposite sides thereofand is joined to the shorter flexible member 9', as by means of afastener 21. for movement in unison therewith. Consequently the drivingforce of the motor as im arted to the longer flexible member by thepiston 2! will impart like moveme t to the shorter endless member andthe two act ve portions l8 and 19 will have like movement for actuatingthe window in a well-balanced manner.

To revent the window from being o ened from the outside the piston is ofa se f-lock ng cons ruction such as is s own in Fig, 4 wherein is illrated a sect on 28 firmly anc ored to the flex ble m mbe 9 and a. floa isection 29 which is movable relative to the anchored or fixed section.the relative y movable section having a central sleeve 30 slidab y suporting the same on a link rod 3| in a substantially flu d tight manner.In the illustrated embodiment, this rod serves as a connecting link forthe opposite ends of the lower flexible member and is ri idly attachedto the piston section 28 by a clamp nut 32. The connec or 3| may comprse separable parts threadedly connected as at 33 for ease of assembly,and while the connector passes continuously through the piston it servesto connect the flexibie member to the opposite sides of the piston.

Interposed between the piston sections is an expansible c utch or lockcomprising one or more shoes 34 supported on resilient toggle-like arms35 and embraced by encircling resil ent rings 36 which not only serve tocontract the shoes and hold them in position on the toggle arms but alsomay actually constitute the active face for the window locking shoes.The spring arms 35 may constitute radial extensions of a spring plate3'! rig dly connected to the piston rod 3| and suitably backed by a bodyplate 38, these two plates beng conveniently clamped in position by theseparable parts of the piston rod insert. The outer ends of the togglearms are engaged in pock-' ets 39 formed in the back or inner side ofthe brake shoe means along with a coupling plate 40 which latter isrigidly connected to the floating piston section by spacers 4|. Byreason of this construction fluid pressure actuation of the floatingsection will move the lock shoes relative to and toward the fixed pistonsection, thereby deflecting the toggle arms to permit the lock shoescontracting from effective engagement with the chamber wall under theinfluence of the spring retaining rings 36. However, any attempt tolower the window from the outside will be frustrated by imparting aninward movement of the rod 3i relative to the floating section 30(movement to the right in Fig. 4) which will cause the body plate 38 topress on the toggle arms and 75 4 thereby expand the shoes into firmlocking contact with the chamber wall.

The pulleys l6 and I1 may be journaled in brackets 42 which are in turnmounted upon the end walls 43 of the motor chamber 20, and thestrip-like flexible piston rod 9 is passed through openings 44 in suchend walls, each opening being suitably packed by a gasket 45 held inposition by a plate 46. By having the flexible members of ribbon-likeform the fluid tight sealing of each end of the motor chamber isfacilitated by reason of the fact that the ribbon design actuallypresents two flat surfaces joined by the narrow edges. Consequently, thegasket has a slit therein, the opposing sides of the slit wiping insealing contact the flat surfaces of the flexible band. The narrow edgesare effectively sealed by the sides of the slits hugging the same Wherethey join each other. 7

The arrangement of the pulleys l6 and I"! on the opposite ends of themotor provides a compact unit which facilitates the mounting andinstallation of the motor in confined quarters, such as obtain in thewindow well of a vehicle door, and for such purpose a pair of brackets Mare provided, one at each end of the motor. The mounting is renderedadjustable at each end whereby any slack in the flexible support may betaken up, such adjustment being herein provided by a screw 48 passingthrough a. slot 49 in each bracket. By adjusting either or both bracketsthe endless flexible members may be maintained taut. The piston attachedends of the flexible piston rod are reinforced by clips 50 and engagedin slots 51 in the outer ends of the separable parts of the connector3|, being suitably anchored in place as by the rivets 52.

The twov active portions l8 and i9 impart an evenly guided movement tothe window panel so as to move the same up and down in a smooth andwell-regulated manner while the connecting lugs 6 play in and out of thebearing 5 to accommodate any irregularity of movement between the windowand the flexible window support.

In lieu of two actuating bands 2. single one may be utilized asillustrated in the modification shown in Fig. 6, wherein the flexiblemember 53 has an active flight or portion 54 to which the window bracket55 is connected by a play connection 56, similar in construction withthat illustrated in Figs. 2 and 3. The bracket 55 is preferably arrangedbeneath the center of gravity of the window for a simple balancedconstruction to which the horizontal disposition of the fluid motor iswell adapted. However, it is obvious that manual or other types of powerdrives may be utilized to regulate the flexible support for the window,which latter term is used herein to include doors and similar closures.

In Figs. 7 and 8 a difierent form of connection between the flexiblemember and the piston is illustrated. The opposite ends of theribbon-like piston rod 9 are joined by a connector rod or link 51, beingsecured in slots in the ends thereof by rivets 58. The link 51 in thisview is in the form of a cylindrical plug having a reduced end portion59 to provide a shoulder 60, and this plug is detachably fitted within asleeve 6| fixed to the piston section 62. The sleeve has a flatformation 63 received by a like shaped opening in the piston section 62to hold the latter against rotative movement thereon, and the pistonsection is secured in position on the sleeve by two embracing clamp nuts64 and 65, the latter nut having a flange 66 overhanging the rim 61 ofthe plug 51 to cooperate with the internal shoulder 88, on which theplug shoulder 60 seats, in locking the plug in place.

The floating piston section 69 has limited sliding movement on thecylindrical end portion iii of the sleeve. the packing member II servingto seal this sliding ,fit. fluid driven movement of the section on theend portion during which motion the locking shoes at the outer ends ofthe toggle arms 13 are released in a manner similar to that in theembodiment of Fig. 4. The rigid toggle arms have pivotal bearing againstthe back of shoulders I2, being held thereagainst by a light coiledspring I0 which also places the shoes under a light pressure sufilcientto support them ready for immediate response to window impartedmovement. The reduced end portion 59 of the link plug has a fiat tongueengaging in a slot I6 in the end of the sleeve to resist relative tumlngof the parts. I

In this embodiment the shoe space between the piston sections isprovided restricted communication with the opposite ends of the motorchamber H, as by means of a small bleed port I8, Fig. '7,

.or by a larger port 19, adapted to be closed by a check valve 80. Thischeck valve is in the form of a ring plate freely movable on a spacingwasher M as limited by the retaining ring 82, the retaining ring andspacing washer being conveniently held in place along with the pistonsection 62 by the clamp nuts 64 and 65. The function of either or bothof these restricted communications is to normally maintain a pressureequalization on opposite sides of each piston section to frustrate anyattempt to manipulate the window to an open position and, further. toprovide ready fluid responsive operation of the window.

Referring to the embodiment of Figs. 9 through 13. a single flexiblemember 8;! is utilized to provide the two active portions or flights 84and 85 supported by upper pulleys 86 and lower pulleys 81, the latterbeing carried by and at the opposite ends of the fluid motor 88. Theflexible member is fastened at one end to one side of the piston 80,similar to that shown in Figs. 4 and '7, and after taking upwardly overthe adjacent pair of upper and lower pulleys is extended across to thecompanion upper pulley and thence down to the underlying pulley 81. Thisforms an idle portion 90. The member is then passed about the lowerpulley, and back up to the immediately overlying pulley, taking aboutthe latter in superposed relation to the portion already thereon bypassing beneath the same. This produces the active flight portion 85,and thereafter the flexible member is interrupted by a crossovercoupling 9| to dispose the continuation of the flexible member upon theoutside of that portion first passed about the lower pu1ley,. in whichrelation the continuation takes about such lower pulley and into themotor chamber where it is fastened to the other side of the piston. Thecoupling BI with the adjacent member portions provides, in efiect, asecond idle flight portion.

As illustrated in Figs. 12'and 13, the coupling 9I comprises separableparts, one part 92 having side cars 93 with registering seats 94 whilethe.

A shoulder 12 limits the.

oi! a screw 88. The screws 98 may be rendered accessible through theinterior finishing of the vehicle sothat adjustment may be made fromtime to time to take up any slack in flexible window support. Because ofthis arrangement the motor may be permanently mounted on the vehiclebody structure by the brackets 99.

Depending from the window frame I 00 is a pair of brackets IOIsupporting a transverse bar I02 which has band straddling arms I03 ateach end formed with horizontal bearings I04 similar to those in Figs. 2and 3. Oppositely extending lugs I05 are carried by the flexible bandand engage in the bearings I04, the lugsbeing fixed by a pin I06 to acleat In! on the flexible member. As the window is operated, the lugswill be free to ride in and out in accommodation to any diilerencebetween the guided movement of the window and that of the activeportion. A set screw I00 engaged in a slot I09 of each bracket IOIpermits the transverse bar I 02 to be adjusted for properly disposingthe bearings I04.

The flexible support provides a positive and well guided windowmovement; The flexible member is disposed axially of the piston so thatthe latter pushes and pulls on the flexible band in the direction ofpiston travel and within the plane of the piston path. The positivesupport provided by the flexible member is due primarily to the factthat the latter is of fixed lineal extent throughout and since it ismounted in tension on fixed points of support, each flight or portionbetween any two adjacent points of support will likewise be of fixedlineal extent. The fixed points of support, as provided by the pulleysor wheels, afford a roller bearing mount for the firm though flexiblewindow support. is held to a straight course and against canting to abinding tilt in its guideways. The window is given, in effect. a rigidsupport which rides over and about its four points of su port with aminimum of friction and without substantial uncontrolled play orlooseness. The two points of attachment. with the window are related tobodily support the window properly positioned. The window cannot betilted counter-clockwise, as viewed in Fig. 1, into binding engagementwith its guiding channels 2 because of the redetermined lineal dimensionof the control part of the flexible member which extends over the upperpulleys I4 and I5 and one lower pulley I I in passing between the twopoints of window attachment. Likewise. the window cannot be tiltedclockwise because of the invariable length of the power part of theflexible member which extends beneath the lower pulleys I6 and I1 andover upper pulley I5 in passing from one point of attachment to theother. The up er part transmits the refluired portion of the forceapplied to one side of the window as may be necessarv to move the otherside in an even and well guided manner. Inv other words it transmitsequalized parallel movements to all parts of the window. The windowadjusting or moving force is ap lied to the power or lower part of theflexible member whichls also acting'in tension. The power part is, ineflect, divided by the piston into fore and aft sections, the aftsection being the oneto which the pull is applied while the ore secti nis the one which pays out through the front end of the motor cham r. andthese two sections are normally acting in tension. Ho ever, since thefore section is likewise supported in a taut state, it willcooperatively assist the control part in maintaining the window inproper position. The pull on Therefore, the window the art section willact through the tensioned control part and in cooperation with the foresection, the endless member moving on its roller support as a rigidnon-extensible body having a predetermined lineal dimension whichmaintains the window poised for an even and smooth motion oftranslation. Upon reversal of the motor the fore section becomes the aftsection, and vice versa. In this connection it will be observed that thetwo sections of the power art enter and emerge from the motor chamber tosubstantially the same extent in order to preserve this solid or firmmounting for the window, and that each section, while being a singleply. nevertheless serves to move plural active portions which are hereinarranged to the same side of their respective supporting wheels. Thearrangements illustrated produce, in effect, two endless members, ashorter one including the active portion I9 (85) and a larger oneincluding the active portion l8 (M). The cross-over coupling 9| ties thetwo endless members together with the shorter one located in the larger,while the coupling 21 ties the individual endless members in the samerelation, the two 1ndividual endless members in this instanceconstituting the flexible band member. In both constructions the pointsof attachment will be held in a predetermined relationshi for holdingthe window properly poised on the active portions.

Furthermore, since the flexible member, which comprises the dual activeportions of Figs. 1 and 9, is acting in tension, it will be apparentthat any window imparted movement will be transmitted by the flexiblemember to the window lock for immediately setting the latter. Therefore,the weight of the window normally will set the lock sufliciently tosupport the window elevated when the motor becomes inoperative.

While the foregoing description has been given in detail it is not theintention thereby to preclude the use of the inventive principlesinvolved in other physical embodiments or to restrict their scope beyondthe definition of the appended claims.

What is claimed is:

1. In a motor vehicle having a slidable closure adapted to be moved intoand out of a well provided in the body wall of a motor vehicle, aflexible member arranged within the well and having an active verticalportion therein, means connecting the closure to the active portion, afluid motor comprising a chamber and a piston, the opposite ends of theflexible member being connected to the opposite sides of the piston.bracket extensions carried beyond the oppos te end walls of the chamber,a pulley journaled on each bracket extension, the flexible member takingover the pulleys and passing through openings in the end walls, meansconnecting the flexible member to opposite sides of the piston, andother bracket means supporting the chamber and its carried pulleys as aunit for selectively adiusting either pulley to take up slack in theflexible member.

2. Closure regulating means comprising an endless member with supportingmeans therefor to provide an active portion, a second endless memberfastened to the flrst endless member at a point spaced from such activeportion for movement in unison therewith, means spaced from the firstsupporting means and supporting both endless members adjacent theirpoint of securement and providing an active portion of the secondendless member in substantial parallel relation to the first activeportion, means directly engaged with the first endless member forreciprocating 8 the active portions, and means on the active portionsfor supporting a closure thereon.

3. Closure regulating means comprising an endless member with supportingmeans therefor to provide an active portion, a second endless member,means spaced from the first supporting means for supporting an activeportion of the second member in substantial parallel but spaced relationto the first active portion, a part of said second supporting means alsosupporting the first endless member in superimposed relation thereto,means operable for reciprocating the active portions, means on theactive portions for connecting the latter to a closure for adjusting thesame, said connecting means embodying spaced bracket parts eachdepending from the lower edge of the window and straddling one of theactive portions, and means fixed to each active portion andinterengaging with the straddling bracket part for establishing theconnection.

4. Closure regulating means comprising a flexible support mounted toprovide spaced active flexible portions substantially in parallelrelation, means for reciprocating the active portions, and means forconnecting the active portions to a closure for adjusting the same, saidconnecting means embodying spaced bracket parts one for each portion andeach part provided with spaced bearing portions extending transverselyof and straddling the adjacent active portion, and a member carried byeach active portion and having bearing portions at the opposite sidesthereof engaging with the spaced bearing portions of the respectivebracket part for limited riding movement therein to accommodate relativelateral movement between a connected closure and the active portions.

5. Closure regulating means comprising an endless band with supportingmeans therefor to provide an active portion, a second hand fastened tothe endless band for simultaneous movement therewith, means spaced fromthe first supporting means and supporting an active portion of thesecond band substantially in parallel relation to the first activeportion, means operable for reciprocating the active portions, and meanson the active portions for connecting the latter to a closure foradjusting the same, said reciprocating means comprising a motor having achamber and a reciprocable part therein to which the ends of the secondband are connected, the two supporting means each including a wheelcarried by the motor, both active portions extending substantially at anormal to the path of reciprocation for the motor part, the second bandtaking over one wheel alone and over the other wheel jointly with theendless band.

6. A closure regulator comprising a flexible member, pairs of upper andlower pulleys, the flexible member passing from the lower pulley of onepair to its associated upper pulley to provide one active portion andthence over to and about the pulleys of the adjacent pair to provideanother active portion and a, third portion, a, crossover couplingmember on the third portion, the flexible member having oppositelyextending terminals at the opposite sides of the third portion connectedby the coupling member for movement as a unit, means on the activeportion for operatively connecting the same to a window, and an actuatorto which the flexible member is connected.

7. A closure regulator comprising a flexible member, a pair of pulleysover which the member passes to provide an active portion and a parallelportion, the latter overlying a terminal portion of the member, a secondpair of pulleys, the member extending from one end of said parallelportion over to and about the second pair of pulleys to provide a secondactive portion and then from the latter back to the first pair ofpulleys there terminating in superposed relation to the other end ofsaid parallel portion whereby-the two terminal portions lie uponopposite sides of said parallel portion, means on the activeportions forconnecting the latter to a closure; and means detachably coupling theterminal portions together.-

8. In a motor vehicle, a slidable window adapt ed to be lowered withina'well provided in the body of a motor vehicle, a flexible memberarranged within the well and having an active portion supported thereinbetween a pulley fixed in the well adjacent its top and spaced pulleysadjustably arranged beneath the fixed pulley, means connecting thewindow to the active portion, and a fluid motor comprising a chamber anda piston, the opposite ends of the flexible member being connected toand extending from the opposite sides of the piston, said adjustablepulleys being carried on the opposite ends of the chamber for adjustmenttherewith as a unit toward and from the fixed pulley to render theflexible member operative. I l

9. A vertically slidable window of a motor vehicle, guide means for thewindow, fixed upper pulley means, a fluid motor unit beneath the pulleymeans and including a chamber and a piston in the chamber with a pulleyjournale'd on each end of the chamber, a flexible transmission member offixed length supported in tension by the pulley means and said pulleysto provide spaced 'vertical active portions, the ends of the flexiblemember being joined to the opposite sides of the piston, spacedattachment means on the window positioning the latter on the activeportions for translatory motion when such activ portions elevate andlower the window, and means adiustably mounting the fluid motor imit totake up slack throughout the length of the flexible member to therebytension the latter for preserving such translatory motion.

10. A window, guide means slidably supporting the window, a flexiblepower transmission comprising a plurality of wheels journaled to providefour fixed points of support and an endless flexible member having afixed lineal dimension and mounted in tension on the wheels to providean endless power transmitting member adapted to move about the fixedpoints of support as a rigid body, such fixed points of support defininga pair of substantially parallel active portions and a pair ofintertying cross portions, each of the four portions having a fixedlineal extent between its two fixed points of support, means bodilysupporting the window at spaced points on the two active portionswhereby to divide the endless member into opposing control parts ofpredetermined length acting in tension to transmit a translatory motionto the window, and a fluid motor having a piston interposed in one crossportion to apply the operating fluid pressure impulses thereto in anaxial direction.

11. A window, guide means slidably support- 7 ing the same, a regulatorcomprising flexible means supported in tension to provide a pair ofactive portions, actuating means for the portions, said active portionsbeing in the form of flat bands supported by like wheels, a pair of armscarried by the window and providing lateral guideways extending inplanes paralleling the flat faces of the bands, means carried by eachactive portion movably engaging a respective one of the guideways forsupporting the window for bodily movement, said guideway engaging meansprojecting normally to the planes of the flat faces and adapted to ridein the guideways to accommodate any unparallel relation between thefixed guide means and the active portions, the bands being supported intension by the wheels against flexing in the direction of extent of the'guideways, and means adjustably mounting the arms for positioning thewindow with respect to its guide means.

'12. A vertically slldable window, guide means slidably supporting thesame, pulley means fixedly mounted adjacent the path of the window, afluid motor unit including a chamber, a piston in the chamber, a pulleyjournaled on each end of the chamber, and a flexible member ofpredetermined length connected to the opposite sides of the piston andserving as the piston rod for the motor, said flexible member takingover said pulleys and removably passing about the pulley means formounting and demounting with the motor as a unit with respect thereto,means adjustably mounting the motor with respect to the pulley means fortensioning the flexible memher, and means detachably and operatively connecting the window to the flexible member.

13. A motor vehicle having a window panel slidable in guideways fromacross a window opening into a well in the side wall structure of thevehicle body, bearings arranged in the well to provide four relativelyfixed points of support, flexible window supporting means having aflexible member portion supported by two adjacent bearings to provide ineffect a short endless memher with an active part and a second part,said window supporting means also having a flexible member portionsupported by all four bearings to provide in efiect a'relatively longerendless member with an active part and a second part, means bodilysupporting the window panel positioned on the two active parts againstbinding in the guideways, and means operable to reciprocate the windowsupporting means, the two flexible member portions being interconnectedfor movement of the two active parts in unison whereby to impart amotion of translation to the window against binding throughout itsmovement.

14. A window, guide means slidably supporting the same, wheels arrangedto provide four relatively fixed points of support, a ribbon-like bandhaving a section extending about the four points of support insuccession and back again about the third point beneath the band portionthereon, said band having another section taking over the fourth pointon top of the band portion thereon, cross-over means interlockingtogether the ends of the two sections at opposite sides of the band partbetween the third and fourth points, means coupling the opposite ends ofthe two sections to form in effect an endless power transmitting memberhaving compan on active portions supported by the first two and the lasttwo points of support respectively, means positioning the window on thetwo active portions for a motion of translation on the guide means, andmeans operable to reciprocate the band to so move the window.

15. A window, guide means slidably supporting the same, wheels arrangedto provide four relatively fixed points of support, a ribbon-like bandhaving a section extending about the four points of support insuccession and back again about 11 the third point beneath the bandportion thereon, said band having another section taking over the fourthpoint on top of the band portion thereon. cross-over means interlockingtogether the ends of the two sections at opposite sides of the bandpartbetween the third and fourth points, means coupling the opposite ends ofthe two sections to form in effect an endless power transmitting memberhaving companion active portions supported by the first two and the lasttwo points of support respectively, means positioning the window on thetwo active portions for a motion of translation on the guide means,means adjustably mounting one wheel for tensioning the endless powertransmitting member about all of the wheels, said cross-over meanspermitting relative movement of said band part to effect such tensioningadjustment, and means operable to reciprocate the band to so move thewindow.

16. A window, guide means slidably supporting the same, two pairs ofupper and lower wheels arranged to provide four relatively fixed pointsof support, flexible transmission means extending about the four pointsof support in succession and retaking about the third and fourth pointsto define substantially parallel active parts at the corresponding sidesof said pairs for movement in unison, means supporting the window onsaid active parts for translatory movement on the guide means, and meansoperable to recip rocate the endless means.

17. A vertically slidable window, guide means slidably supporting thesame, a regulator for the window in the form of a flexible flat bandsupported in tension at four relatively fixed points of support toprovide a pair of substantially vertical active portions with opposedinner faces, window carried bracket arm parts straddling and extendingacross the opposite fiat faces of each active band portion, lug meansprojecting from the opposite faces of each active band portion, said lugmeans engaging the bracket arm parts at the opposite sides of eachactive band portion for providing equalized support for the windowagainst the flexing of the band portion, and means for imparting backand forth movement to the active band portions.

18. A vertically slidable window, guide means slidably supporting thesame, a regulator for the window in the form of a flexible flat bandsupported in tension at four relatively fixed points of support toprovide a pair of substantially vertical active portions with opposedinner faces, a connector lug fixed to and extending substantially normalfrom a flat face of each active band portion, a bracket arm part fixedlycarried by the window and extending across the lug carrying face, saidarm part movably engaging its lug at upper and lower points of contactwithin the width of the band whereby the load of the window will betransmitted to the band lengthwise thereof, means operatively holdingthe fixed bracket arm part against riding off the lug incidental to theflexing of the band, and means for moving the band back and forth.

19. A motor vehicle having a closure. 2. flexible member having anactive portion supported between spaced pulley means, means connectingthe closure to the active portion for being opened and closed thereby, afluid motor comprising a chamber and a piston, the piston having tworelatively movable sections, the flexible member being connected to andextending in opposite directions from one of the piston sections wherebyupon movement of the closure in either direction said one piston sectionwill be pulled in a corresponding direction by the flexible memberaccording to the direction of closure movement, and locking meanscarried by the other of said piston sections and connected to beoperated by and upon a closure imparted pull of the flexible member inone direction to lock the piston against movement in the chamber, anopposite pull on the flexible member serving to pull said one pistonsection to hold the locking means inoperative for closure impartedmovement of the flexible member and said one piston section as a unit.

20. A window system comprising a window, a fluid motor for operating thesame having a chamber and a piston therein, a transmission operativelyconnecting the piston to the window for back and forth movement as aunit and including a power transmitting member slidable through thepiston for limited relative movement, and a lock carried by the pistonand operable by a window imparted movement of the power transmittingmember relative to the piston for locking the latter against movement,said piston being fluid responsive and slidable on the powertransmitting member initially to render the lock inoperative andthereafter to move the power transmitting member for adjusting thewindow.

21. A window system comprising a window, a fluid motor for operating thesame having a chamber and a piston therein, a transmission operativelyconnecting the piston to the window for back and forth movement as aunit and in-- cluding a flexible power transmitting member slidablethrough the piston and supported in tension by a pair of wheels at theopposite ends of the chamber, means limiting the relative movementbetween the piston and the flexible power transmitting member, and alock operable by a window imparted movement of the power transmittingmember relative to the piston for locking the latter against movement,said piston being fluid responsive and slidable along the flexible powertransmitting member to initially render the lock inoperative andthereafter to move the flexible power transmitting member for adjustingthe window.

22. A window system comprising a window, a fluid motor for operating thesame having a chamber and a piston therein, an endless powertransmitting member operatively connecting the piston to the window forback and forth movement as a unit and slidably extending through thepiston for limited play movement with respect thereto, and a lockcarried by th piston and operable by a window imparted movement of theendless power transmitting member relative to the piston for locking thelatter against movement, said piston being fluid responsive and slidableupon the endless power transmitting member initially to render the lockinoperative and thereafter to move the endless power transmitting memberfor actuating the window.

23. A motor vehicle having a vertically slidable window adapted to belowered within a well provided in the body wall of the motor vehicle, anendless flexible member arranged within th well and having a controlpart and a power part, each part being of a predetermined length andhaving its opposite ends attached to the window at spaced points, spacedsupporting means for the flexible member supporting both parts intension. said parts bodily supporting the window operatively connectedto the power part for pull- 5 ing the flexible member in one directionto lower the window and in the opposite direction to raise the window,and a lock operatively connected to the flexible member by a playconnection for locking the piston arrested by a window imparted downwardpull on the flexible member and for releasing the piston upon a reversepull.

24. A motor vehicle having a vertically slidahie window adapted to belowered within a well provided in the body wall of said motor vehicle,an endless flexible member arranged within the well and having multiplepoints of attachment to the window spaced relativelyto each other, saidpoints of attachment eflecting the bodily support of the window to causethe weight of the latter normally to exert a downward pull on theflexible member at the spaced points of attachment, a fluid motorchamber, a piston operating in the chamber and operatively connected tothe flexible member for pulling it in one direction to raise the window,and a lock operatively connected to the flexible member by a playconmention for locking the piston arrested by a window imparted downwardpull on the flexible member and for releasing the piston upon a reversepuli,

' r ANTON RAPPL;

REFERENCES CITED The following references are of record in the flle ofthis patent:

UNITED STATES PATENTS Number Name Date 1,500,765 Norwood July 8, 19242,323,731 'Shetzline July 6, 1943 10 1,963,790 Jepsen June 19, 19341,198,138 Lovell Sept. 12, 1916 1,622,886 Siller .1. Mar. 29, 19272,338,069 Horton Dec. 28, 1943 1,573,541 Demand Feb. 16, 1926 15 Re.15,331 Demand Apr. 11, 1922 1,834,701 Gustafson Dec. 1, 1931 2,094,124Huffman Sept. 28, 1937 2,103,252 Gartin Dec. 28, 1937 948,603 AltrichterFeb. 8, 1910 20 1,834,235 Birrell Dec. 1, 1931 1,627,697 Fredericks May10, '1027 1,612,232 Strandt Dec. 28, 1926 1,328,584 Noonan Jan. 20, 19201,919,671 Shetzline July 25, 1933 FOREIGN PATENTS Number Country Date581,285 Germany July 25, 1933 415,562 France July 16, 1910 so 328,796England May 8, 1930 780,276 France Jan. 29, 1935

